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Phredox Articles & Analysis
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SITE CHARACTERISTICS The aim of this pilot study was to verify the efficiency of sulfidized nanoiron (S-nZVI) in reductive dehalogenation of highly chlorinated ethenes (primarily TCE) in the field conditions. S-nZVI has earned a reputation as a promising material due to its high reactivity towards some pollutants, its increased mobility, and its longevity caused due to suppressed corrosion. The ...
The Ecomondo trade fair: Lutz-Jesco will be presenting system solutions from a single source whether for disinfecting process water, bleaching textiles or manufacturing primary materials such as PVC: chlorine gas is central to a range of industrial processes. This important chemical is also highly dangerous, and even small quantities of chlorine gas can cause irreversible damage to human health. ...
According to the United Nations World Water Development Report, population growth, urbanisation and economic development in sub-Saharan Africa has produced a demand for water that outstrips the water infrastructure present in many countries of this region. As a result, the bulk of the population of sub-Saharan Africa is suffering from water shortages. Lutz-Jesco argues that modern technologies ...
Measuring equipment for water quality is becoming increasingly advanced. Some meters can be equipped with up to 13 different sensors. But is it always necessary to measure so many? Which parameters should you investigate in which situation? In this article we will examine various water problems and their corresponding parameters. When measuring water quality, it is first important to determine ...
Background: Water quality detector is a device used to measure the quality of water. It usually consists of multiple sensors and measuring systems to detect water pH, REDOX potential (ORP), electrical conductivity (EC), dissolved oxygen (DO), temperature, turbidity, hardness, ammonia nitrogen, nitrite nitrogen (NO2-N), nitrate nitrogen (NO3-N), total phosphorus (TP), total nitrogen (TN), ...
The role of water quality sensor:Water quality sensor is a device used to measure water quality, usually consisting of multiple sensors and measuring systems. The function of water quality sensor is to detect various substances in water, and convert them into electrical signals, and then through the measurement system for processing and analysis, get the indicators of water quality. Water quality ...
Why is Calibration Required? It is a simple question and a simple answer. Data is worthless if it is not correct, and calibration is required so we–the users–can verify that the electrode or sensor is giving us the correct data. It is one of the most important aspects of quality control and, in extreme cases, can cost tens of thousands of dollars and hours of time if even one ...
This article focuses on the common causes of noise in analog devices related to water quality measurement, but the concepts and preventative measures are applicable to any electronic measuring device. We go over the types of electromagnetic interference along with how to identify and prevent them. Additional tips for designing a noise-resistant system are provided toward the end of the ...
Within the confines of a jointly created project with BOKU Austria (Universität für Bodenkultur Wien), we have placed two S2N Smart Buoys in the Lobau quarter of Vienna, in 2 different parts of the backwater of the river Danube. The buoys will continuously measure water temperature, pH, dissolved oxygen, redox potential and conductivity data, which then will be transmitted to our ...
Find out how the Ultrameter II gave Dr. Tempest fast accurate results that let him act quickly and help save the lives of thousands of people. When disaster strikes, people are scared and disorganized. They need resources — safe water and proper sanitation — that aren’t easy to come by in the aftermath. Without the help of humani-tarian organizations to provide assistance, ...
Drinking water reservoirs worldwide often suffer from frequent outbreaks of algal blooms. Their water quality degrades and becomes undrinkable. Algal blooms can grow so massive that they are even visible from outer space. Rising temperatures, extreme weather, stagnant water, and excess of nutrients accelerate algae growth. On hot summers, algae can grow very fast forming dense surface ...
LG Sonic will make use of Artificial Intelligence (AI) to further develop the software algorithm which will make it possible to predict algal blooms based on water quality data automatically. Furthermore, it will provide detailed information about the intensity and the impact of the algal bloom on the ecosystem of the water body. The updated algorithm will be implemented in LG Sonic’s ...
The results of tests with a sodium chloride tracer in a shallow maturation pond in Brazil are presented. The pond – a full-scale effluent treatment unit for around 250 p.e – was 0.80 m deep with a length/width ratio of 4.3:1, and had accumulated sludge for 12 years to about 40% of the total volume. The pond is subject to daily cycles of thermal stratification/destratification, as shown by ...
Removal of Mn(II) from Fe(II)- and Mn(II)-rich groundwater in cold regions is challenging, due to slow Mn(II) removal kinetics below 15 °C. This study demonstrated onset, acclimation, and acceleration of Mn(II) removal in a two-stage pilot-scale biofilter (Fe and Mn filters) at varying low on-site temperatures (8–14.8 °C). Mn(II) removal commenced at 8 °C in the Mn filter after Fe(II) ...
The Dutch algae control company LG Sonic introduced an ultrasonic depth sensor to give the customers real-time insight in the water levels which allows them to adequately deal with water level fluctuations. Reservoirs used for industrial processes or the production of drinking water often deal with strong water level fluctuations. Due to events of high demand and evaporation, water levels in ...
Summer 2015, as the eighth month of the year approaches (August), we are starting to hear and read in the news about sudden algal blooms occurring in freshwater lakes and marine environments. Many popular beach resorts have put up warning signs proclaiming the water is unsafe for recreational purposes. This is an understandable precautionary measure since phytoplankton abundance or more ...
Gas purification using a chemical scrubber is a technology that has been applied successfully for decades for the purposes of eliminating contaminants in a gas flow. However, although it is a technique that is easy to design and quite flexible, it entails certain disadvantages and/or risks. In recent years there has been considerable interest in developing alternative technologies that, without ...
Purification of Industrial Gases Gas phas filtration: Chemical scrubber vs Physical Adsorption Gas phase filtration using a chemical scrubber is a technology that has been applied successfully for decades for the purposes of eliminating contaminants in a gas flow. However, although it is a technique that is easy to design and quite flexible, it entails certain disadvantages and/or risks. In ...
Answer: Total Dissolved Solids (TDS) is a measure of the combined content of all the inorganic and organic substances such as mobile charged ions, minerals, salts or dissolved metals in a volume of liquid. Normally TDS is used in water testing, where TDS is defined as anything present that is not pure water (H2O) molecule or suspended solids. Finding out the exact amount of TDS in water has many ...
Cyanobacteria- also known as blue-green algae- cause problems when blooming in lakes, ponds and reservoirs. Mainly due to the production of toxins, cyanobacteria cause fish kill and the death of other aquatic animals. They also affect human beings, causing paralysis and skin irritation, and they are even thought to be related to the occurrence of liver cancer. In drinking water reservoirs, the ...